Particle retainer cup for riser pipes

Abstract

A unitary retainer cup adapted for being attached around a continuous vertical pipe so as to retain particulate materials in the cup. The cup has a lower cylindrical sleeve portion and a conical-shaped upper retainer portion including suitable clamp means which permits mating edges of a longitudinal joint in the cup to be retained together. The cup can be constructed of thin sheet material which is sufficiently flexible to permit it being placed around a pipe and clamped firmly onto the pipe. The lower sleeve portion is lined with a resilient material to accommodate irregularities in the surface of the pipe. The cup conical portion has a drain opening provided near its lower end to permit periodic removal of accumulated material from the cup.

What I claim is: 
     
       1. A retainer cup adapted for attachment around a continuous substantially vertical structure for retaining accumulated particulate material, the cup comprising: a cylindrical shaped sleeve adapted for being attached around a continuous substantially vertical structure, said sleeve having a resilient material layer attached to its inner surface;   a conical-shaped casing having an enlarged diameter at its upper end and being joined at its lower end to said sleeve, said sleeve and casing having a single longitudinal joint having opposite mating edges thereof, said casing having a closable opening located at its lower end near said sleeve providing a means to drain the particulate material; and   fastening means for attaching together said opposite mating edges of the sleeve and casing, so as to provide an unitary cup for retaining particulate material within the casing.   
     
     
       2. A retainer cup according to claim 1, wherein the resilient material layer attached within said cylindrical sleeve is 0.50-0.10 inch thick so as to contact uniformly the vertical structure outer surface. 
     
     
       3. A retainer cup according to claim 1, wherein said fastener means on the sleeve consist of at least two bolts and wing type nuts attached adjacent one edge of the longitudinal joint in said sleeve, which bolts fit into elongated slots provided in the opposite edge of the longitudinal joint and are clamped by the nuts, and said fastener means on the casing consists of a hook and eyelet attached to the opposite edges of the casing near the casing upper end. 
     
     
       4. A retainer cup according to claim 1, wherein the thickness of said sleeve is 1.0-1.25 times the thickness of said conical shaped casing. 
     
     
       5. A retainer cup according to claim 1, wherein said fastener means are push type spring loaded clamps attached to the outer side of said sleeve and conical-shaped casing. 
     
     
       6. A retainer cup according to claim 1, wherein said fastener means includes at least one hinged over-center type clamp attached to mating edges of said sleeve. 
     
     
       7. A retainer cup adapted for attachment around a continuous vertical pipe for retaining accumulated particulate matter therein, the cup comprising: a cylindrical shaped sleeve adapted for being attached around a continuous vertical pipe, said sleeve having a resilient material layer 0.05-0.10 in. thick attached to its inner surface;   an upper conical shaped casing having an enlarged diameter at its upper end and being contiguously joined at its lower end to an edge of said sleeve, said sleeve and casing having a single longitudinal joint extending therealong and having opposite mating edges thereof, said casing having a closable opening located at its lower end near said sleeve providing a means to drain the particulate material, wherein said sleeve has a thickness of 1.0-1.25 times that of the casing; and   fastening means for attaching together the opposite mating ends of said sleeve and casing after they are attached around a vertical pipe, so as to provide an unitary cup for retaining particulate material within said casing.   
     
     
       8. A retainer cup according to claim 1, wherein said opening is closed by a removable plug. 
     
     
       9. A retainer cup according to claim 2, wherein said sleeve is attached around a continuous substantially vertical pipe having angle of 0°-45° with the vertical and the casing upper end is substantially parallel with a ceiling surface. 
     
     
       10. A retainer cup unit attached around a continuous vertical structure for retaining accumulated particulate material in the cup, the unit comprising: a cylindrical shaped sleeve attached around a continuous substantially vertical structure, said sleeve having a resilient material layer attached to its inner surface;   a conical-shaped casing having an enlarged diameter at its upper end and being joined at its lower end to said sleeve; said sleeve and casing having a single longitudinal joint having opposite mating edges thereof, said casing having a closable opening located at its lower end near said sleeve; and   fastening means adapted for attaching together said opposite mating edges of the sleeve and casing, so as to provide a unitary cup unit fastened around said continuous vertical structure near a ceiling for retaining particulate material within the cup unit.